NATRION; NOVRIYANTI SIAGIAN. Pengaruh Biaya Operasional Pendapatan Operasional Dan Non Performing Loan Terhadap Net Profit Margin (Studi Pada Bank Busn Devisa Yang Terdaftar Di Bursa Efek Indonesia Periode 2011-2015). Jurnal Liabilitas, [S. l.], v. 3, n. 1, p. 77–89, 2018. DOI: 10.54964/liabilitas.v3i1.33. Disponível em: https://mail.jekobis.org/ojs/index.php/liabilitas/article/view/33. Acesso em: 18 apr. 2026.